Congrats, fishfloater!
I too recently conquered ich after a 2+ month long battle with meds, trying to not salt and heat up a planted tank. However, due to the lack of effectiveness of the meds, I salted and heated, and ich is totally gone.
salt and heat are the way to go in my experience.
i'd say keep it salted for another 3 days just to be sure, maybe boost the heat up some too.